Head portion of an electric toothbrush



FIG. 1 is an enlarged, perspective view of head portions of an electric toothbrush showing our new design; and,

FIG. 2 is a top view thereof.

The broken line showing of environmental structure in FIGS. 1 and 2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for head portion of an electric toothbrush, as shown and described. 